Parts cleansing machines



March 4, 1958 L.. .1. N. KELIHER ETAL 2,825,349

PARTS cLEANsING MACHINES 5 Sheets-Sheet 1 Filed Oct. 4, 1951 fo/VAR@ L./VoRrHm/P, JR

INVENToRs A TTU'RNEYY March 4,1958 L.. .1. N. Kr-:LlHl-:R ET Al.2,825,349

PARTS CLEANSING MACHINES Filed oct. 4. 1951 s sheets-sheet 2 ,fo/VA RD LA/omHRuJR.

INVENToRs A TTORNE Y Y 7, 5g" o4 M March 4, 1958 L. J. N. KELIHER ETAL2,825,349

PARTS CLEANSING MACHINES Y Filed OGL-4, 1951 s shee'ts-sheet 5 l l v I X5575/? J N. Kn /HER LEONARD L. /VoRTHRz/R JR.

7 y INVENTORS ATTORNEY United States Patent O PARTS CLEANSING MACHLQESLester J. N. Keliher and Leonard L. Northrup, Jr., Dallas, Tex.

Application ctober 4, 1951, Serial N 249,652

19 Claims. (Cl. 13e-itis) This invention relates to cleansing machinesand more particuiarly to a cleansing machine having a rotatable impellerfor circulating cleansing liquid in a tank.

It is desirable during repair or maintenance operation to leanse theparts of internal combustion motors, and the me. or oil impregnated dirtwhich adheres strongly to the parts, the cleansing machine employed tofree the parts of this dirt, oil and grease must heat the -cleansingliquid in which the parts are immersed in order to expedite the actionof such liquid and must circulate the cleansing liquid violently aboutthe parts in order to mechanically remove the adhering dirt from theparts. The tank of the cleansing machine should preferably be providedwith a settling basin to prevent recirculation of dirt which has beenremoved from the parts; and the rotatable impeller mounted in the tankfor circulating the cleansing liquid should be so disposed relative tothe settling basin that rotation of the impeller will not stir up thedirt settled in the settling basin. Moreover, the tank should be of suchconformation that the tendency of the impeller to displace the body ofcleansing `liquid from the center toward the circumference of the tankin a vortex and leave the central portion of the tank free of liquid isovercome, and the liquid is forced to circulate throughout all portionsof the interior of the tank to bring the cleansing liquid into intimateviolent contact with all surfaces of parts placed in the tank forcleansing. in addition, the shaft of the impeller, which usually extendsdownwardly through the bottom of the tank, should be provided with aseal which prevents leakage of cleansing liquid from the tank past thebearings of the shaft.

Accordingly, it'is an object of the invention to provide a new andimproved cleansing machine.

It is another object of the invention to provide a new and improvedcleansing machine having an improved rotatable impeller for circulatingcleansing liquid in a tank.

Still another object of the invention is to provide a new and improvedcleansing machine having means mounted in a tank for heating a cleansingliquid circulated through the tank by an impeller, and so disposed thatthe liquid is constantly directed into contact with the heating means.

A further object of the invention is to provide a new and improvedcleansing machine having a tank provided with a settling basin and animpeller rotatably mounted in the tank to circulate cleansing liquidthroughout the tank without materially reagitating or stirring up dirtsettled in the basin.

It is still further object of the invention to provide a new andimproved cleansing machine having a tank of such conformation as toovercome the tendency of an impeller mounted in the tank to displace thebody of cleansing J'luid in a vortex from the center toward thecircumference of the tank.

It is another object of the invention to provide a new Since these partsare usually covered with grease Patented Mar. 4, 1958 shaft is providedwith a seal maintained in an air pocket while the impeller is rotated.

.Still another object of the invention is to provide a rotatable shaftwith a seal and with means for forming and maintaining an air pocketabout the seal.

Briefly stated, the new and improved cleansing machine includes a tankhaving a heater disposed adjacent but spaced from the bottom of the tankand supported on radially extending vanes. An impeller mounted in saidtank for rotation about a vertical axis agitates and propels cleansingliquid upwardly past the heater. The tank is provided with an outwardlyextending bay or interrupter chamber which, in conjunction With thesupporting Vanes, overcomes the tendency of the impeller to displace thecleansing liquid in a vortex outwardly from the center toward thecircumference of the tank. The impeller is provided with vertical finsextending upwardly from a substanttially horizontal circular base whichoverlies a settling basin and prevents undue disturbance of the dirtwhich may have settled in the base. The impeller is also provided with adependent hood or skirt which telescopes over a vertical bearing sleeve.The bearing sleeve is provided with an air passage communicating withthe vertical annular space between the skirt and bearing sleeve, and airmay pass through this passage to displace liquid from between the upperportion of the skirt and sleeve and form and maintain an air pockettherebetween` A grease seal isV disposed in said bearing sleeve to sealbetween the bearing sleeve and the impeller shaft which extendstherethrough. In another embodiment of the invention, the skirt may beprovided with transverse apertures through which liquid is expelled frombetween the sleeve and the skirt as the skirt is rotated. A furtherembodiment employs a skirt provided with a helical screw which alsoexpels liquid from between the sleeve and the skirt as the skirt isrotated.

Additional objects and advantages of the invention will readily beapparent from the reading of the following description of a deviceconstructed in accordance with the invention, and reference to theaccompanying drawings thereof, wherein:

Figure l is a perspective view of the cleansing machine, some portionsbeing broken away to reveal the interior of the tank and the componentsdisposed therein;

lFigure 2 is an enlarged fragmentary elevation, some parts being brokenaway to show certain details of construction, showing the heatercontrols;

Figure 3 is an enlarged vertical sectional view showing the impeller andbearing sleeve structure;

Figure 4 is a view similar to Figure 3 showing a modied form of theimpeller skirt provided with apertures to pump liquid from between theimpeller skirt and the bearing sleeve;

Figure 5 is a similar view of another modified form of the impellerskirt provided with a helical screw to expel liquid from between theimpeller skirt and the bearing sleeve;

Figure 6 is a sectional view taken on the line 6 6 of Figure 5; and

Figure 7 is a side view of a modiiied rorm of the cleansing machine,some portions being broken away to reveal the interior of the tank andthe components disposed therein.

in the drawings, the numeral itl designates a cleansing A shield 13formed by a pair of rings i4 and 15 and a wire grill 16 extendingtherebetween is disposed beneath the tank and around the supportinglegs. The tank has a bay or interrupter chamberV extending outwardlyfrom one side thereof for a purposero be set forth below. The open upperend of the Y ftralcirculareaperture 3:70.LV AV settlingbasin-31"having-Y Y central; aperture 35 which is preferablyconcentricwithY 1VYVK v*A bearing sleeve-36 extendsgupwardly'into theint'erior, 25

of-the spacebetweenthe bearingsleeveandth 'Y Ywelded to #the tankl whileYthe brackets -191and1 20 =may Y VrbenweldedV to reinforcing straps-'274and 25, respectivelyif secured to the cover 18.by screws Y276.- lAhandlev2'7 isv mountedonA the reinforcing straps andi'V the coverA.bythe l pair; ofscrews 28.5' While particularV rnethods of securing1Vthe:bracl ets,V the-reinforcing straps, andhandle toY their.Y associatedelements f have been particularly? deseribediv'itH will be'tapparentthat other conventional methods 'offse Y Y Y curingtheseeelenaentstothevtank-and cover rnayabe;ern-ll l5 'ployedif Y Theftanlel 11f-ha sac'onvex"bottom129provided VVWithceii-1 `verticalannularjvvall3:2is'secured to the bottornfof# l tanlcf'byj-weldng or'inlany other;suitable vconventional20 nannerYThebottomSvfofthesettling*basinkinelinesiV ldownward-lytoward{an-outlet-34, andis.provided-twitlial respect: tothecentral aperture fofftlletank` brottorn--29l`VYV`Vof'thetankfl'l-through the central apertures ofthe bottrrn-l yof#thesettling'basin-and thertankrand is-rigidly secured;- to thesettling `basin byra number of tl'ir'eaded-studs37;V etending throughsuitable apertures irnacir'cularVv inclined il flange 38 integral withthebearingfsleeveintofthreaded 30 ,Y b oresVin"the' bottomf33- of;theisettlingrbasin. Y A Washer'39'and a nutllythreaded onl'eachAstudfhold-gthej;"iV

' inclined -ange andA bearing sleeve -in `pla'ceon VtheYV settling .Y 1basin,` andfa I gasketY 42-A clamped Vbetween fthe ffia'nge' and-V v thebottomeofithe vsettling basin seals againstuid leakage therebetween;YSince the flange VB18-isl inclined'complevv `frnentary to the bottomofthe settlingrfbasin', andthe-,bean n Y ingf sleeve isgdisposedaxiallytof thesettlingf'basim-i al t VVsenin-annular vertical wallr43is'forrnedpartially Vsurround:dv

' ing thebearing sleeve but spaced therefrom, Thepurposef.; 40

ersemi-VV annularwall-will-befhereinafterexplained. Y- Y The shaft'44ofthe impeller45 extends axiallyfthrough the bearingsleevefandeisrotatably supported thereirrby: Y a pnair'of spaced ballrbearingassemblies :L46 and-457;: and .45V Y apair offretaining-ringsf48 and-49;Thelupper bearing 'Y assembly includesjan -outerrace tl-resting-onanannulari ledge 51; provided-by'an enlargemntofthec'entrallb"o`r`e,,

'1 of@ the; bearing-fs1eeve3 faV plnralityroflballs'l; and; an

i vupper retainer ring .'48 isV disposed{inanlannularreeesseVV iinjthefrinjipeller: shaftandextends4A outwardly overl-Land j about theinner racef53to lir'nitrthe downward movement it ofthe impell'ershaft'pelative-to the bearing sleeve; V The Y lowerretaining-ring-49/isjdisposed inan annularfr'ecessev Y VYinthe'impellershaftsspaced below Ythe shearing-aridserves:V

` to limit the upward movement ofthe impeller, shaftby.

abutting the inner Yraceof thefupper bearing, Vandto perrnit removalof"V said npperbearingin` disassemb1y.:j Y The lowerV ball bearingassembly V47-{sinriilar1y includes f anni 60 opter race 56 disposed inarenlargement 57 of the lower:A Y end of the'centralbore'ot'lthebearingsleeve,"a-'pluralityV 'l of balls 58V,` and an inner race 579 disposedaboutgthe ini#l `ledge 67V` fornied by thev re f theimpellerfshaftl` fYA seal assembly ,705 is proifidedlbetween tween; theg'npper;anfdflowerv seal lasseinblils; fand-'bet the impeller. Trh'ergasket66and the -seal ring @prevent leakage of air or liquid between the'upper re duced por- Y tion of the impeller shaftrandtlie inpellel;

y meimpener shaftand the bearingrsleeve 3,6andincludesngppper v sealassembly 71 anda lower@ sealjasse'mbly'72; 'Y The upper Y :seal assemblycomprises a resilientfannular -sealingmem-fV Q ber 'YISJheld-inranannular-1,metalliclretainer.'member 74 j (see Figi 5). Y Theresilientannular sealing :member 721';

has a ilexible liporange `75 formed'in it'sjinnerfportionYV i Yturned'upwardly and inwardly toward ase'ratingfsleeveY K Y76 whichtisrigidly secured on'theimpeller shaftt`44ibe1ow thelgltlbV 6.0thereroflgflhe angegl. of'. thev resilient n--f nulr i eating nreibermayb1e"forced on twardly i ing'enggementfwithftheseatingQsleevegofgthesha YY Y Y Thl `exiseal assembl'yj'Y/Z; restsonianlannular ledge. j Y Ysleev'e'jaiul,tthegimpellerQshgift.V The annular spacegfb' fairen 'ofrhimpeuerfwil I betweenjtheT settling i basin and lthe Y interiorV .owhich ,'willte'd 'to' draWfthe `,liquidifijorrijthecy ridrical l spaceV79.5YAir'will/ ther'rr b`e=drfaWn ughfthe ond y YSSVintomthe'cylindrialsp; e agliti-tof'fo'rm ank y fck" at the upperend"'thereof."1tfis lpreferablethat4 th co 'cylindrical jspqe,Ytimeinsuringthat me pdreeyiin. Y* i always be present;

is rotated, the screw 87 will force liquid out of the cylindrical spacein the conventional manner.

It will be apparent that compressed air may be supplied to thecylindrical space through the passage 81 in a machine having either ofthe two modified forms of the skirt, if so desired.

The impeller is rotated by a motor 88 mounted in a motor housing 89secured to the tank 11 in any suitable conventional manner. Asubstantially U-shaped grill shield 9i) may be mounted below the motorhousing. The motor shaft 91 is provided with a drive pulley 92 which 4isconnected to a pulley 93 on the lower end of the impeller shaft 44 by apair of belts 94.

The tank is provided with a plurality of spaced substantially radiallyextending supporting vanes 95 which are welded or otherwise suitablysecured to the concave bottom 29 of said ltank. A substantially U-shapedtubular heater tube 96 is supported on the vanes 95 and has its endsextending outwardly through the wall of the tank. One end 97 of theheater tube may be connected to an exhaust stack, not shown, while ytheother end 98 of the heater has disposed therein a main burner 99 and apilot burner 106 which are supplied with fuel from a conduit 101 througha conventional pi'lotstat 102, a magnetic valve 103 and a shut off valve164. The pilot burner is provided with fuel by a conduit 105 connectedto the pilotstat and is controlled by a thermocouple 106 energizedelectrically through a conductor or lead 107. The magnetic valve 103 iscontrolled by a thermostat 10S communicating with the interior of thetank 11 and which electrically actuates the magnetic valve to controlthe temperature of the liquid Within the tank.

The outlet 34 of the setting basin 31 is connected in any suitableconventional manner to a T-shaped two-way valve 109 whose handle may beturned to allow liquid to enter from conduit 111 -connected to a sourceof water, through a shut-off valve 112 and the valve 109 tothe settlingbasin 31 and thence into the t-ank 11. The settling basin and the tankmay be drained into a conduit 113 connected to a sewer line by turningthe handle of the valve 109 to another position, thereby allowing theliquid to drain from the settling basin through a shut-off valve 114into the conduit 113 and thence to the sewer line.

ln use, the tank 11 is rst lled with water and a detergent, and -theburners are lighted to cause the heater tube 96 to heat the water in thetank. The parts Ito be cleaned are then placed in the tank on a grill115 supported on the heater. If the parts are long yor have projectionsextending therefrom, end portions of the par-ts i of the projections maybe disposed in the bay 17. The cover 13 is then closed and the motor 83connected across a source of electricity to drive the impeller 45. Theliquid in the tank will be drivenor swirled upwardly by the impellervanes 116 about and into intimate con- 1,. tact with all surfaces of theparts, the hot water, aided by the chemical action of the detergent andby the mechanical forces caused byits agitation or swirling, dissolvingand removing dirt, grease and oil from the parts. The supporting vanes95 and the bay 17 prevent the impeller from displacing the water inavortex from the center toward the circumference of the tank, so thatparts placed in the middle of the tank will be fully subjected Ito theaction of the Water. Y Y

The vanes 116 of the impellery project upwardly from a circular plate117 which curves upwardly to the central boss 62 of the impeller. Thecircular plate 117 is of larger diameter than the aperture 30 in thebottom of the tank, and extends toward the concave bottom so that itsouter lower peripheral edge lies closely adjacent the bottom. Thecircular plate ofthe impeller obviously acts as a bafe and isolates to aconsiderable degree the liquid in the settling basin from turbulent towof liquid in the tank, so thatdirt and sludge `once settled in the basinwill not be stirred up and Aagain moved .to the tank.

If desired, the conduit E55 may be connected to a l in the modied formsof the impeller assembly shown Figures 4 and 5, the liquid in thecylindrical space is expelled either by the pumping action of theapertures 36 in the skirt Stia of Figure 4, or by the pumping ac' tionof the helical screw 87 of Figure 5.

In any form, however, an air pocket will be created in the upper portionof the cylindrical space 79 which wiii prevent the passage of liquidbetween the impeller shaft 44, the sleeve bearing 36 and the sealassembly 70.

lt will be seen that a cleansing machine has been disclosed whichincludes a tank 11 of irregular conformation which prevents displacementof liquid in the tank from the center to the circumference of the tankin a vortex when the liquid is circulated by a rot-ary impeller in thetank. Moreover, it will be seen that the tank is provided with asettling basin 31 in which liquid and sludge is isolated from theturbulence of the liquid in the tank by the circular plate 117 `of theimpeller which extends beyond the sides of the settling basin. Finally,it will be seen that uid leakage between the impeller shaft 44 and thebearing sleeve 36 in which it is mounted is prevented by a seal assembly7i? and the formation of an air pocket within the bore of the impellerskirt about lthe upper end of the bearing sleeve and the seal assembly.

In Figure 7 is illustrated a still further modified form of thecleansing machine, in which an elongate tank 113 is provided with twoimpellers 119 and 120, similar to the impeller 45 of the machineillustrated iu Figure l. The bottom 121 of the tank slopes downwardlyfrom the vertical walls 122 of the tank and from a central raisedportion 123 toward two apertures 124 and 125 so that dirt and sludge maysettle into the two settling basins 126 and 127, respectively. Theoutlets 12S and 129 of the two settling basins are connected by conduits130 and 131, respectively, to a valve 132. The valve 132 controls thepassage of fluid into or out of the settling basins, and is connectedwith a conductor 132x: which communicates with supply and exhaust linesin the same manner as the form lrst described.

The impellers 119 and 12@ are mounted for rotary movement in the samemanner as the impeller 45 of Figures l, 3, 4 and 5 and have impellershafts 133 and 134, respectively, which are driven by a motor (notshown). Conventional pulleys 135 and 136 are rigidly secured to theimpeller shaft whereby a belt (not shown) connected to the drive shaftof the motor may simultaneouslyY drive both impellers.

power required to drive them. If both were rotated in the samedirection, an undue turbulence or swirling of the liquid would resultand a greater force would have to be applied to the impeller shafts torotate the impeller shafts.

The bottom 121 of the tank is provided with a plurality of vanes 137disposed substantially radially about each of the impellers and whichextend inwardly from the wall 122 of the tank. A heater tube 139,similar to heater tube 96, is supported on the vanes. ported on theheater tube for supporting parts to be cleansed in the tank.

A bay or interrupter chamber, such as bay 17, is not necessary since theliquid driven by each impeller will be thrown into the path of travel ofthe liquiddriven by the t other impeller thereby preventing thedisplacementof The two impellers are preferably driven in oppositedirections to decrease the i A grill 140 is supv s aspirato i spacetherebetween; a shaft depending from said impeller and extendingdownwardly through said bearing sleeve; sealing means between said shaftand said bearing sleeve to prevent leakage of uid therebetween; andmeans for expelling liquid from said space.

7. The device of claim l characterized in that said tank has a mainsubstantially cylindrical wall extending upwardly from said bottom and abay extending outwardly from the wall for preventing displacement ofliquid in the tank in a vortex from the center to the circumference ofthe tank.

8. The device of claim 1 characterized in that said tank bottom isprovided with a plurality of radially spaced supporting vanes; and aheater disposed on said vanes, said vanes and said heater being disposedin the path of flow of liquid contained in the tank to be engaged bysaid liquid for preventing displacement of liquid contained in the Ytank in a vortex from the center to the circumference of the tank.

9. A cleansing machine including, a tank having an inwardly slopingbottom; a settling basin secured to said tank bottom having an outletand an inclined bottom sloping toward said outlet, said bottoms havingaligned apertures; a bearing sleeve extending upwardly through saidapertures; means on said bearing sleeve closing the aperture in thebasin bottom; an impeller disposed in said tank above said apertures andhaving a depending tubular skirt disposed about said bearing sleeve oversubstantially the whole length of said bearing sleeve, said skirt beingspaced from said bearing sleeve to form a cylindrical spacetherebetween; a shaft secured to said impeller and extending downwardlythrough said bearing sleeve; sealing means between said shaft and saidbearing sleeve to prevent leakage of iiuid therebetween; and uidpressure means for expelling liquid from said cylindrical space.

10. A cleansing machine including, a tank having a downwardly andinwardly inclined bottom; a settling basin secured to said tank andhaving an outlet and an inclined bottom sloping toward said outlet, saidbottoms having aligned apertures; a bearing sleeve extending upwardlythrough said apertures; means on said bearing sleeve closing theaperture in the basin bottom; an impeller disposed in said tank abovesaid apertures and having a dependent tubular skirt disposed about saidbearing sleeve over substantially the whole length of said bearingsleeve, said skirt being spaced from said bearing sleeve to provi-de anannular space therebetween; a shaft secured to said impeller andextending downwardly through said bearing sleeve; sealing means betweensaid shaft and said bearing V sleeve to prevent leakage of uidtherebetween; and means for admitting gas into said annular space toform a gas pocket therein.

11. A cleansing machine including, a tank having a downwardly andinwardly sloping bottom; a settling basin secured to said tank andhaving an outlet and an inclined bottom sloping toward said outlet, saidbottoms having aligned apertures; a bearing sleeve extending upwardlythrough said apertures; means on said bearing sleeve closing theaperture in the basin bottom; an impeller disposed in said tank abovesaid apertures and having a dependent tubular skirt disposed about saidbearing sleeve over substantially the whole length of said bearingsleeve, said skirt being spaced from said bearing sleeve to form acylindrical space therebetween; a shaft secured to said impeller andextending downwardly through said bearing sleeve; sealing means betweensaid shaft an-d said bearing sleeve to prevent leakage of fluidtherebetween, said bearing sleeve being provided with a passage foradmitting a gas into said cylindrical space above the lower ends of saidskirt and sleeve to form a gas pocket therein whereby the liquid in thetank is prevented from passing upwardly in said cylindrical space. f

12. A cleansing machine including, a tank having a downwardly andinwardly sloping bottom; a settling basin having an outlet and aninclined bottom sloping toward said outlet, said bottoms having alignedapertures; a bearing sleeve extending upwardly through said apertures;means on said bearing sleeve closing the aperture in the basin bottom;an impeller disposed in said tank above said apertures and having adependent tubular skirt disposed about said bearing sleeve oversubstantially they whole length of said bearing sleeve, said skirt beingspaced from said bearing sleeve to form a cylindrical spacetherebetween; a shaft secured to said impeller and extending downwardlythrough said bearing sleeve; sealing means between said shaft and saidbearing sleeve to prevent leakage of uid therebetween, said bearingsleeve being provided with a passage for admitting a gas into saidcylindrical space above the lower ends of said skirt and sleeve to forma gas pocket therein whereby the liquid in the tank is prevented frompassing upwardly in said cylindrical space, said skirt being providedwith means for expelling liquid from said cylindrical space when saidimpeller is rotated.

13. A cleansing machine including, a tank having a downwardly andinwardly sloping bottom; a settling basin having an outlet and aninclined bottom sloping toward said outlet, said bottoms having alignedapertures; a bearing sleeve extending upwardly through said apertures;means on said bearing sleeve closing the aperture in the basin bottom;an impeller disposed in said tank above said apertures and having adependent tubular skirt disposed about said bearing sleeve oversubstantially the whole length of said bearing sleeve, said skirt beingspaced from said bearing sleeve to form a cylindrical spacetherebetween; a shaft secured to said impeller and extending downwardlythrough said bearing sleeve; sealing means between said shaft and saidbearing sleeve to prevent leakage of uid therebetween, said bearingsleeve being provided with a passage for admitting a gas into saidcylindrical space above the lower ends of said skirt and sleeve to forma gas pocket therein whereby the liquid in the tank is prevented frompassing upwardly in said cylindrical space, said skirt being providedwith a plurality of circumferentially spaced apertures adjacent itslower end whereby liquid is expelled from said cylindrical space whensaid impeller is rotated.

14. A cleansing machine including, a tank having a downwardly andinwardly sloping bottom; a settling basin having an outlet and aninclined bottom sloping toward said outlet, said bottoms having alignedapertures; a bearing sleeve extending upwardly through said apertures;means on said bearing sleeve closing the aperture in the basin bottom;an impeller disposed in said tank above said apertures and having adependent tubular skirt disposed about said bearing sleeve oversubstantially the whole length of said bearing sleeve, said skirt beingspaced from said bearing sleeve to form a cylindrical spacetherebetween; a shaft secured to said impeller and extending downwardlythrough said bearing sleeve; sealing means between said shaft and saidbearing sleeve to prevent leakage of fluid therebetween, said bearingsleeve being provided with a passage for admitting a gas into saidcylindrical space above the lower ends of said skirt and sleeve to forma gas pocket therein whereby the liquid in the tank is prevented frompassing upwardly in said cylindrical space, said skirt being providedwith a helical screw disposed in said cylindrical space for expellingliquid therefrom when said impeller is rotated.

15. A cleansing machine including: a tank having a bottom; a settlingbasin open at its upper end and connected at said upper end with thebottom of said tank; a bearing sleeve disposed in said basin andextending upwardly through said open upper end into sai-d tank; a shaftrotatably mounted in said bearing sleeve and projecting above the upperend of said sleeve; an impeller mounted on said shaft and having anintegral imperforate circular plate disposed adjacent the bottom of saidtank and completely overlying the open end of said basin and i p1ate,Ysaid nnpeueralsshayinlgatu ,from the undersidelofsaid lcirculrlll Ytending downwardly intosaidib'asin' aln Y I y I ciV the-bearingsleev'elength; and,means,rconxiectedwitli,v Y,said bearingsle'eveforcondctingair Yunder pressre from t exteriorly of s'aid tankandbasinViiitf'tlieQs'pace!between,

t said bearing slee'yegrse'aliiig'ineans'between said shaft anddirectionV oflrotation of the,skiIt-Wherebyfliquidg'is ex-v peiled fromVsaid f cylindrical? 1spaeY Wiien'f said impeller isrotated; and' meansconnectedwithlsaid Ybearing,,sleeve and communicating iwith'ls'aid`vcylindricalj'space Ybetvrleensaid slir't'and sleeve abovethelowerendof'saidfskirtr con- 25 ducting gas from aV remotepointintoVsaidylindricai'space i as Vliquid is ejectedlier'efrin. s t l17-. `Inl amachine `having-a` rotatable I`in ipeller for'cirlcurilatingv liquid; kaV tubular t' skirt depending front the f irn-WardlyV in. the direction [ofA rotation Loft' said tvsrkiit whereby tliquid in said cylindricalvspacc 'ispropelleddownwardly YYOf said spacetoward Vthe, lowricndbff said.skir'tfasf'saidY @skirt'is rotated.' Q IY. Y A

18. A cleansing x'nachineY irlcliidingif,a.tnl{fhavingV av Y, downwardlyand inwardly slopingbottom; a se'ttlingvbasin having an outlet and aninclined bottomtrsloping'rtoward said, outlet, said bottomshavingfaligned Vapertures;a

bearringnslere, extending uinvlrdlyillrffolh@idf-@mm3 depending fromVsaidrirnp-e1ler 'andlexteri afmnlarA space aboverthef lower1 ends; Vol' KV.' i 19; A cleansingmlliinff i claim 1 wherein the, tubular skirtA1s impA out` itt s1e`1.1gth.YV

y V 1,678,018 ao;

Y Y2,595,660 t means-1011 saliti., bearing;sleeve.V closmgth hasnibottom; Van limpllrrhavingg rlitypffnsestending upwardly? 'omtsaldtplatskirt depending from said platteland fdispose Y bearingvsvleeve oversubstantiallylthe/wljlel' isaid 5 i' Y bearing sleeve, said 'fsrkirtjbeing space df sleyelto provideY anrannularjspacetlie b Y throngh'saidbearing sleeve;and;sealingjY Y said 'shaiftrandsaid bearing Vsleevetopfveii ,y Y uid'therebetween, saidbearingleeyebei with a passage forVadrnitiiigrfgV undef Cited in the me ofl this patent;u

` References i UNrTEDf-SVTATESBATNTS V2,374,500 e 2,432,291V 2508348.'2,595,659

